[Preprocessor/Modules] Separate the macro directives kinds into their own MacroDirective's subclasses.

For each macro directive (define, undefine, visibility) have a separate object that gets chained
to the macro directive history. This has several benefits:

-No need to mutate a MacroDirective when there is a undefine/visibility directive. Stuff like
 PPMutationListener become unnecessary.
-No need to keep extra source locations for the undef/visibility locations for the define directive object
 (which is the majority of the directives)
-Much easier to hide/unhide a section in the macro directive history.
-Easier to track the effects of the directives across different submodules.

llvm-svn: 178037

1 files changed, 7 insertions, 7 deletions

diff --git a/clang/lib/Lex/Preprocessor.cpp b/clang/lib/Lex/Preprocessor.cpp
index af000ec1d14..bda72be5554 100644
--- a/clang/lib/Lex/Preprocessor.cpp
+++ b/clang/lib/Lex/Preprocessor.cpp
@@ -306,15 +306,15 @@ StringRef Preprocessor::getLastMacroWithSpelling(
   StringRef BestSpelling;
   for (Preprocessor::macro_iterator I = macro_begin(), E = macro_end();
        I != E; ++I) {
-    if (!I->second->getInfo()->isObjectLike())
+    if (!I->second->getMacroInfo()->isObjectLike())
       continue;
-    const MacroDirective *
-      MD = I->second->findDirectiveAtLoc(Loc, SourceMgr);
-    if (!MD)
+    const MacroDirective::DefInfo
+      Def = I->second->findDirectiveAtLoc(Loc, SourceMgr);
+    if (!Def)
       continue;
-    if (!MacroDefinitionEquals(MD->getInfo(), Tokens))
+    if (!MacroDefinitionEquals(Def.getMacroInfo(), Tokens))
       continue;
-    SourceLocation Location = I->second->getInfo()->getDefinitionLoc();
+    SourceLocation Location = Def.getLocation();
     // Choose the macro defined latest.
     if (BestLocation.isInvalid() ||
         (Location.isValid() &&
@@ -643,7 +643,7 @@ void Preprocessor::HandleIdentifier(Token &Identifier) {
 
   // If this is a macro to be expanded, do it.
   if (MacroDirective *MD = getMacroDirective(&II)) {
-    MacroInfo *MI = MD->getInfo();
+    MacroInfo *MI = MD->getMacroInfo();
     if (!DisableMacroExpansion) {
       if (!Identifier.isExpandDisabled() && MI->isEnabled()) {
         if (!HandleMacroExpandedIdentifier(Identifier, MD))